Global Patent Index - EP 4163619 A4

EP 4163619 A4 20240703 - OBSERVATION DEVICE AND OBSERVATION METHOD

Title (en)

OBSERVATION DEVICE AND OBSERVATION METHOD

Title (de)

BEOBACHTUNGSVORRICHTUNG UND BEOBACHTUNGSVERFAHREN

Title (fr)

DISPOSITIF D'OBSERVATION ET PROCÉDÉ D'OBSERVATION

Publication

EP 4163619 A4 20240703 (EN)

Application

EP 21826244 A 20210526

Priority

  • JP 2020105338 A 20200618
  • JP 2021020020 W 20210526

Abstract (en)

[origin: EP4163619A1] An observation apparatus 1 includes a light source unit 10, an irradiation optical system 20, an imaging optical system 30, a modulation unit 40, an imaging unit 50, an analysis unit 60, beam splitters 71 and 72, and mirrors 73 and 74. The analysis unit 60 obtains a real part of a function χ(t) = log [1 + U<sub>obj</sub>(t) / U<sub>ref</sub>(t)], defined by time series data U<sub>obj</sub>(t) of a complex amplitude image of object light on an imaging plane of the imaging unit 50 and time series data U<sub>ref</sub>(t) of a complex amplitude image of reference light on the imaging plane, based on time series data I(t) of an intensity image of interference light on the imaging plane and time series data I<sub>ref</sub>(t) of an intensity image of the reference light on the imaging plane. Further, the analysis unit 60 obtains an imaginary part of χ(t) from the real part of χ(t) using the Kramers-Kronig relations, and further obtains U<sub>obj</sub>(t). Thus, an observation apparatus capable of using a camera having a low frame rate as an imaging unit when observing a moving observation object is realized.

IPC 8 full level

G01N 21/17 (2006.01); G01N 15/14 (2024.01); G01N 15/1429 (2024.01); G01N 15/1434 (2024.01); G01N 21/45 (2006.01); G02B 21/14 (2006.01); G02B 21/36 (2006.01)

CPC (source: EP US)

G01N 15/1429 (2013.01 - US); G01N 15/1436 (2013.01 - US); G02B 21/14 (2013.01 - EP); G01N 15/1429 (2013.01 - EP); G01N 15/1434 (2013.01 - EP); G01N 15/1459 (2013.01 - EP); G01N 2015/1006 (2013.01 - US); G01N 2015/1454 (2013.01 - EP); G02B 21/36 (2013.01 - EP)

Citation (search report)

  • [Y] JP 6052965 B2 20161227
  • [Y] US 9411146 B2 20160809 - IWAI HIDENAO [JP]
  • [Y] US 9851243 B2 20171226 - REMBE CHRISTIAN [DE], et al
  • [YD] IWAI HIDENAO ET AL: "Doppler-spectrally encoded imaging of translational objects", OPTICS COMMUNICATIONS, vol. 319, 1 May 2014 (2014-05-01), AMSTERDAM, NL, pages 159 - 169, XP055893660, ISSN: 0030-4018, DOI: 10.1016/j.optcom.2014.01.013
  • [YD] YOONSEOK BAEK ET AL: "Kramers-Kronig holographic imaging for high-space-bandwidth product", OPTICA, vol. 6, no. 1, 7 January 2019 (2019-01-07), pages 45, XP055757068, DOI: 10.1364/OPTICA.6.000045
  • [YD] YOONSEOK BAEK: "Kramers-Kronig holographic imaging for high-space-bandwidth product: supplementary material", OPTICA, vol. 6, no. 1, 7 January 2019 (2019-01-07), US, pages 45, XP093164681, ISSN: 2334-2536, DOI: 10.1364/OPTICA.6.000045
  • [Y] CHENG SHEN ET AL: "Non-iterative complex wave-field reconstruction based on Kramers-Kronig relations", ARXIV.ORG, CORNELL UNIVERSITY LIBRARY, 201 OLIN LIBRARY CORNELL UNIVERSITY ITHACA, NY 14853, 11 May 2020 (2020-05-11), XP081989005, DOI: 10.1364/PRJ.419886
  • See references of WO 2021256202A1

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

EP 4163619 A1 20230412; EP 4163619 A4 20240703; CN 115836209 A 20230321; JP WO2021256202 A1 20211223; US 2023213432 A1 20230706; WO 2021256202 A1 20211223

DOCDB simple family (application)

EP 21826244 A 20210526; CN 202180042067 A 20210526; JP 2021020020 W 20210526; JP 2022532443 A 20210526; US 202118008490 A 20210526